Danger, Will Robinson

“Danger, Will Robinson!” is a catchphrase from the 1960s’ American television series Lost in Space spoken by voice actor Dick Tufeld. The Robot (played in body by Bob May), acting as a surrogate guardian, says this to young Will Robinson (portrayed by Bill Mumy) when the boy is unaware of an impending threat. In everyday use, the phrase warns someone that they are about to make a mistake or that they are overlooking something. The phrase is also used in hacker culture.

When given in person, the vocal klaxon is sometimes accompanied by oscillation of the speaker's arms, parodying the Robot's body language.

Despite the popularity of the phrase, it was said only once on the show. This was during episode 11 of season 3 "The Deadliest of the Species". The Robot gave warnings intermittently to Will and the other crew members of the Jupiter 2, in the form of the expressions "Warning!" and "Danger!"

In Killing Floor (video game) a female character named "Ash Harding" may shout this as a warning to other players.

Todd Friel from Wretched Radio uses the term frequently especially when someone is on "thin ice" in danger of falling away from orthodoxy

In Dragonball Z Abridged in Episode 44

In "Gilmore Girls" season 2 episode 8, Lorelai Gilmore (played by Lauren Graham) says "Warning, Warning... Danger, Will Robinson, danger" to her daughter to warn her about something her Grandmother is going to make her do.